<h2>Full example</h2>
<pre><code># Source: awklang.org
BEGIN { ascetion = bsection = 0 }
$2 ~ /^[aA][0-9]+/ { asection++ }
$2 ~ /^[bB][0-9]+/ { bsection++ }
END { print asection, bsection }
</code></pre>
